A python-cryptography security, bug fix, and enhancement update has been released for Red Hat Enterprise Linux 8.
RHSA-2021:1608-01: Moderate: python-cryptography security, bug fix, and enhancement update
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Red Hat Security Advisory
Synopsis: Moderate: python-cryptography security, bug fix, and enhancement update
Advisory ID: RHSA-2021:1608-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1608
Issue date: 2021-05-18
CVE Names: CVE-2020-25659 CVE-2020-36242
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1. Summary:
An update for python-cryptography is now available for Red Hat Enterprise
Linux 8.
Red Hat Product Security has rated this update as having a security impact
of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.
2. Relevant releases/architectures:
Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, ppc64le, s390x, x86_64
3. Description:
The python-cryptography packages contain a Python Cryptographic Authority's
(PyCA's) cryptography library, which provides cryptographic primitives and
recipes to Python developers.
The following packages have been upgraded to a later upstream version:
python-cryptography (3.2.1). (BZ#1873581, BZ#1891947)
Security Fix(es):
* python-cryptography: bleichenbacher timing oracle attack against RSA
decryption (CVE-2020-25659)
* python-cryptography: certain sequences of update() calls when
symmetrically encrypting very large payloads could result in an integer
overflow and lead to buffer overflows (CVE-2020-36242)
For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the Red Hat
Enterprise Linux 8.4 Release Notes linked from the References section.
4. Solution:
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
https://access.redhat.com/articles/11258
5. Bugs fixed ( https://bugzilla.redhat.com/):
1778939 - internal pyca error with X25519, FIPS
1873581 - Rebase python-cryptography to 2.6+ for ed25519 support
1889988 - CVE-2020-25659 python-cryptography: bleichenbacher timing oracle attack against RSA decryption
1891947 - Rebase internal component python-cryptography-vectors
1907429 - Re-add NPN bindings for PyOpenSSL
1926226 - CVE-2020-36242 python-cryptography: certain sequences of update() calls when symmetrically encrypting very large payloads could result in an integer overflow and lead to buffer overflows
6. Package List:
Red Hat Enterprise Linux BaseOS (v. 8):
Source:
python-cryptography-3.2.1-4.el8.src.rpm
aarch64:
python-cryptography-debugsource-3.2.1-4.el8.aarch64.rpm
python3-cryptography-3.2.1-4.el8.aarch64.rpm
python3-cryptography-debuginfo-3.2.1-4.el8.aarch64.rpm
ppc64le:
python-cryptography-debugsource-3.2.1-4.el8.ppc64le.rpm
python3-cryptography-3.2.1-4.el8.ppc64le.rpm
python3-cryptography-debuginfo-3.2.1-4.el8.ppc64le.rpm
s390x:
python-cryptography-debugsource-3.2.1-4.el8.s390x.rpm
python3-cryptography-3.2.1-4.el8.s390x.rpm
python3-cryptography-debuginfo-3.2.1-4.el8.s390x.rpm
x86_64:
python-cryptography-debugsource-3.2.1-4.el8.x86_64.rpm
python3-cryptography-3.2.1-4.el8.x86_64.rpm
python3-cryptography-debuginfo-3.2.1-4.el8.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
7. References:
https://access.redhat.com/security/cve/CVE-2020-25659
https://access.redhat.com/security/cve/CVE-2020-36242
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.4_release_notes/
8. Contact:
The Red Hat security contact is . More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2021 Red Hat, Inc.
